.main {
  height: 100%;
}

.left {
  width: 180px;
  overflow: hidden;
  overflow-y: auto;
  background: #515e6f;
  height: 100%;
  position: absolute;
  left: 0;
  z-index: 10;
  top: 50px;
}

span {
  color: white;
  font-size: 18px;
}

span:hover {
  color: black;
}

img {
  width: 40px;
  height: 25px;
  margin-right: 2px;
}
ul{
  padding-top: 5px;
}
